The document discusses data link layer protocols, including LLC, MAC, and Ethernet standards. It describes the functions of the physical layer, data link layer, and logical link control sublayer. It also covers IP addressing schemes like IPv4 addresses, network classes, public vs private addresses, and subnetting. CIDR is introduced as a method to improve address space utilization and routing scalability on the internet.
These slides cover a topic on Introduction to switching & circuit switching in Data Communication. All the slides are explained in a very simple manner. It is useful for engineering students & also for the candidates who want to master data communication & computer networking.
Although the OSI reference model is universally recognized, the historical and technical open standard of the Internet is Transmission Control Protocol / Internet Protocol (TCP/IP).
The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers, anywhere in the world, at nearly the speed of light.
These slides cover a topic on Introduction to switching & circuit switching in Data Communication. All the slides are explained in a very simple manner. It is useful for engineering students & also for the candidates who want to master data communication & computer networking.
Although the OSI reference model is universally recognized, the historical and technical open standard of the Internet is Transmission Control Protocol / Internet Protocol (TCP/IP).
The TCP/IP reference model and the TCP/IP protocol stack make data communication possible between any two computers, anywhere in the world, at nearly the speed of light.
The TCP/IP protocol suite does not define any protocol in the data-link layer or
physical layer. These two layers are territories of networks that when connected
make up the Internet. These networks, wired or wireless, provide services to the upper
three layers of the TCP/IP suite. This may give us a clue that there are several standard
protocols in the market today. For this reason, we discuss the data-link layer in several
chapters. This chapter is an introduction that gives the general idea and common issues
in the data-link layer that relate to all networks.
❑ The first section introduces the data-link layer. It starts with defining the concept
of links and nodes. The section then lists and briefly describes the services provided
by the data-link layer. It next defines two categories of links: point-to-point
and broadcast links. The section finally defines two sublayers at the data-link layer
that will be elaborated on in the next few chapters.
❑ The second section discusses link-layer addressing. It first explains the rationale
behind the existence of an addressing mechanism at the data-link layer. It then
describes three types of link-layer addresses to be found in some link-layer protocols.
The section discusses the Address Resolution Protocol (ARP), which maps
the addresses at the network layer to addresses at the data-link layer. This protocol
helps a packet at the network layer find the link-layer address of the next node for
delivery of the frame that encapsulates the packet. To show how the network layer
helps us to find the data-link-layer addresses, a long example is included in this
section that shows what happens at each node when a packet is travelling through
the Internet.
INTERNET PROTOCOL (IP)
, Datagram Format
, Fragmentation
, Options
, Security of IPv4 Datagrams
,ICMPv4
, MESSAGES
, Debugging Tools
, ICMP Checksum
, MOBILE IP
, Addressing
, Agents
, Three Phases
, Inefficiency in Mobile IP
A
PROJECT REPORT
On
CISCO CERTIFIED NETWORK ASSOCIATE
A computer network, or simply a network, is a collection of computer and other hardware components interconnected by communication channels that allow sharing of resources and information. Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Simply, more than one computer interconnected through a communication medium for information interchange is called a computer network.
The TCP/IP protocol suite does not define any protocol in the data-link layer or
physical layer. These two layers are territories of networks that when connected
make up the Internet. These networks, wired or wireless, provide services to the upper
three layers of the TCP/IP suite. This may give us a clue that there are several standard
protocols in the market today. For this reason, we discuss the data-link layer in several
chapters. This chapter is an introduction that gives the general idea and common issues
in the data-link layer that relate to all networks.
❑ The first section introduces the data-link layer. It starts with defining the concept
of links and nodes. The section then lists and briefly describes the services provided
by the data-link layer. It next defines two categories of links: point-to-point
and broadcast links. The section finally defines two sublayers at the data-link layer
that will be elaborated on in the next few chapters.
❑ The second section discusses link-layer addressing. It first explains the rationale
behind the existence of an addressing mechanism at the data-link layer. It then
describes three types of link-layer addresses to be found in some link-layer protocols.
The section discusses the Address Resolution Protocol (ARP), which maps
the addresses at the network layer to addresses at the data-link layer. This protocol
helps a packet at the network layer find the link-layer address of the next node for
delivery of the frame that encapsulates the packet. To show how the network layer
helps us to find the data-link-layer addresses, a long example is included in this
section that shows what happens at each node when a packet is travelling through
the Internet.
INTERNET PROTOCOL (IP)
, Datagram Format
, Fragmentation
, Options
, Security of IPv4 Datagrams
,ICMPv4
, MESSAGES
, Debugging Tools
, ICMP Checksum
, MOBILE IP
, Addressing
, Agents
, Three Phases
, Inefficiency in Mobile IP
A
PROJECT REPORT
On
CISCO CERTIFIED NETWORK ASSOCIATE
A computer network, or simply a network, is a collection of computer and other hardware components interconnected by communication channels that allow sharing of resources and information. Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Simply, more than one computer interconnected through a communication medium for information interchange is called a computer network.
ccna workbook and lab manual by NETWORKERS HOME. NETWORKERS HOME understand the importance of CCNA workbook when it comes Cisco certification which is why we offered free CCNA workbook.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
The field of Information retrieval (IR) is currently undergoing a transformative shift, at least partly due to the emerging applications of generative AI to information access. In this talk, we will deliberate on the sociotechnical implications of generative AI for information access. We will argue that there is both a critical necessity and an exciting opportunity for the IR community to re-center our research agendas on societal needs while dismantling the artificial separation between the work on fairness, accountability, transparency, and ethics in IR and the rest of IR research. Instead of adopting a reactionary strategy of trying to mitigate potential social harms from emerging technologies, the community should aim to proactively set the research agenda for the kinds of systems we should build inspired by diverse explicitly stated sociotechnical imaginaries. The sociotechnical imaginaries that underpin the design and development of information access technologies needs to be explicitly articulated, and we need to develop theories of change in context of these diverse perspectives. Our guiding future imaginaries must be informed by other academic fields, such as democratic theory and critical theory, and should be co-developed with social science scholars, legal scholars, civil rights and social justice activists, and artists, among others.
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Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
3. IEEE STANDARDS FOR LAN
LLC
LLC stands for logical link control. LLC is the upper sub layer of
the data link layer. It act as a interface between the media
access control sub layer and the network layer.LLC basic
function are flow control, error control, and framing.LLC also
provides SAP services in OSI model
SAP
Sap stands for Service Access Point. In data link protocol LLC
provides SAP services. A Service Access Point (SAP) is an
identifying label for network endpoints used in Open Systems
Interconnection (OSI) networking
4. IEEE STANDARDS FOR LAN
MAC
The MAC layer is responsible for moving data packets to
and from one Network Interface Card (NIC) to another
across a shared channel
5. IEEE 802.3 MAC FRAME
Function of the physical layer
Encoding / Decoding of signals
Preamble generation/removal (for bit level synchronization)
Bit transmission / reception
Include specification of the transmission / medium.
Function of the medium access control (MAC) layer
On transmission, assemble data into a frame with address and
error detection field
On reception, dis assemble frame and perform address
recognition and error detection.
Govern access to the LAN transmission medium
6. IEEE 802.3 MAC FRAME
Function of the logical link control LLC
Provide an interface to higher layer and perform flow and
error control.
9. STANDARD ETHERNET
The original Ethernet was created in 1976 at
Xerox,s palo alto Research center (PARC). Since
then it has gone throw four generations.
10. WAN PROTOCOLS
Leased lines two types of WAN encapsulation protocols
1) HDLC
2) PPP
HDLC stands for High level data link control is a bit oriented
synchronous data link layer protocol. Developed by the
international organization for standards.
HDLC main goal is to delivering data across the link without
any errors
HDLC uses synchronous transmission.
11. HDLC PROTOCOLS
HDLC need to determine if the data passed
the link without any errors
HDLC discard the frame if error occurs
To achieve this main goal HDLC defines
framing
12. PPP PROTOCOLS
Comparing the basics PPP behaves much like HDLC.
PPP does discard error frames that do not pass the FCS
checks.
Additionally PPP uses a 2 byte protocol called Type Field
Due to this 2 byte protocol called Type Field any vendor
that conforms to the PPP standard can communicate with
other vendor product.
So when connecting a Cisco router to another vendors
router over a PPP serial link, PPP is the data link layer
protocol choice.
This is why PPP has become the most popular and feature
rich of WAN data link layer protocol.
13. FRAME RELAY
Frame relay network are multi-access networks, which
means that more then two devises can attached to the
network.
For Frame relay service a leased line installed between
each router and a nearby frame relay switch, these links are
called Access Links
instead of extending from one router to other each leased
lines are run from one router to a frame relay switch.
14. DIFFERENCE BETWEEN FRAME RELAY & PPP
The difference between Frame relay and ppp
links is that the equipment in the Telco
actually examines the data frame sent by the
router .
Frame relay defines its own data link header
and tailer .
Each frame relay header hold an holds an
address field called a data link connection
identifier (DLCI)
15. IPV4 ADDRESSES
If a devise want to communicate using
TCP/IP it needs an IP Address.
An IP address consist of a 32 bit number
An IPv4 address is a address that uniquely
and universally defines the connections of a
devise ( for example a computer and a
router) to the internet.
168.1.1.1 is an IP address written in dotted
decimal
16. IPV4 ADDRESSES
The actual Binary version is
168.1.1.1
10101000 . 00000001 . 00010110 . 10101100
Each decimal number in IP address is called an octet
168. 1. 1. 1
1st Octet 2nd Octet 3rd Octet 4th Octet
1 Octet = 1 Byte = 8 bits
4 Octets = 32 Bits IP address
The address space (Range) of IPv4
2^32 = 4,294,967,296.
17. CLASSFUL ADDRESSES
In classful address, the address space is divided into five
classes: Class A, Class B, Class C, Class D and Class E.
Range of IP Classes are
Class A 0-127 1.0.0.0 to 126.0.0.0
Class B 128-191 128.0.0.0 to 191.255.0.0
Class C 192-223 192.0.0.0 to 223.255.255.0
Class D 224-239 224.0.0.0 to 239.255.255.255
Class E 240- 255 240.0.0.0 to
18. CLASSFUL ADDRESSES
IP defines three different networks classes for addresses
used by individual hosts address called Uni cast addresses
Uni cast IP addresses are
Class A Uni Cast
Class B Uni Cast
Class C Uni Cast
TCP/IP defines
Class D Multicast
Class E Experimental
19. IP ADDRESSES
The organization in charge of universal IP
address assignment is the
Internet corporation for assigned Network
Numbers ( ICANN )
Administratively a central authority assigned
Class A, B and C networks to companies.
Class A Large Networks
Class B Medium Networks
Class C Small Networks
20. IP ADDRESSES
Network and Host Part in IP Addresses
Classes in binary and dotted decimal notation.
21. PUBLIC AND PRIVATE ADDRESSES
There are two types of addresses employed on the
Internet, public addresses and private addresses .
Public IP Address
A public IP address is the address that is assigned to a
computing device to allow direct access over the Internet. A
web server, email server and any server device directly
accessible from the Internet are candidate for a public IP
address. A public IP address is globally unique, and can only be
assigned to a unique device.
Private IP Address
A private IP address is the address space allocated by Inter
NIC to allow organizations to create their own private
network. The computers, tablets and Smartphone's sitting
behind your home, and the personal computers within an
22. SUBNETTING
Creates multiple logical networks that exist
within a single Class A, B, or C network.
If you do not subnet, you will only be able to
use one network from your Class A, B, or C
network, which is unrealistic
Each data link on a network must have a
unique network ID, with every node on that
link being a member of the same network
23. BENEFITS OF SUBNETTING
1) Reduced network traffic
2) Optimized network performance
3) Simplified management
4) Facilitated spanning of large geographical
distances
24. CIDR
Classless Interdomain Routing
Improve address space utilization
Routing scalability in the Internet
For example, if an ISP owns network
172.16.0.0/16, then the ISP can offer
172.16.1.0/24, 172.16.2.0/24,and so on to
customers. Yet, when advertising to other
providers, the ISP only needs to advertise
172.16.0.0/16